football term, by where a player (usually of lesser ability) will attempt to tackle an opposition player (usually of superior abiliy) in a grossly unfair and extremely violent manner, so as to let the opposition player know that if he values his family jewels then today might be a good day to have an "off day".

The reducer is often aimed at knee height of the opposition player (or in extreme cases, the testicles), and will usually take place in the first few minutes of the game.